diff --git a/src/App/Application.php b/src/App/Application.php
index 19f365f..b8ccd90 100644
--- a/src/App/Application.php
+++ b/src/App/Application.php
@@ -4,6 +4,9 @@ namespace App;
 
 use Silex\Application as SilexApplication;
 use Silex\Provider\SecurityServiceProvider;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use App\Validator\SmsValidator;
 
 /**
  * class Application.
@@ -33,6 +36,16 @@ class Application extends SilexApplication
                 ],
             ],
         ]);
+
+        $this['validator.sms'] = new SmsValidator();
+
+        $this->error(function (\Exception $e, Request $request, $code) {
+            return $this->json([
+                'status' => false,
+                'code' => $code,
+                'message' => $e->getMessage(),
+            ]);
+        });
     }
 
     /*
diff --git a/src/App/Validator/Helper/RequestValidator.php b/src/App/Validator/Helper/RequestValidator.php
new file mode 100644
index 0000000..c8f0781
--- /dev/null
+++ b/src/App/Validator/Helper/RequestValidator.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Validator\Helper;
+
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * trait RequestValidator.
+ *
+ * @author Simon Vieille <simon@deblan.fr>
+ */
+trait RequestValidator
+{
+    /**
+     * Validates a Request
+     *
+     * @param Request $request
+     * 
+     * @return bool
+     */
+    public function validateRequest(Request $request)
+    {
+        return $this->validate(json_decode($request->getContent(), true));
+    }
+}
diff --git a/src/App/Validator/SmsValidator.php b/src/App/Validator/SmsValidator.php
new file mode 100644
index 0000000..c1a9b64
--- /dev/null
+++ b/src/App/Validator/SmsValidator.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Validator;
+
+/**
+ * class SmsValidator.
+ *
+ * @author Simon Vieille <simon@deblan.fr>
+ */
+class SmsValidator implements Validator
+{
+    use Helper\RequestValidator;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($data)
+    {
+        if (!is_array($data)) {
+            return false;
+        }
+
+        return isset($data['sender'], $data['message'], $data['time']);
+    }
+}
diff --git a/src/App/Validator/Validator.php b/src/App/Validator/Validator.php
new file mode 100644
index 0000000..28fa205
--- /dev/null
+++ b/src/App/Validator/Validator.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Validator;
+
+/**
+ * interface Validator.
+ *
+ * @author Simon Vieille <simon@deblan.fr>
+ */
+interface Validator
+{
+    /*
+     * Validates data.
+     *
+     * @param mixed $data
+     *
+     * @return bool
+     */
+    public function validate($data);
+}
diff --git a/web/index.php b/web/index.php
index 49e51db..5c67da0 100644
--- a/web/index.php
+++ b/web/index.php
@@ -1,15 +1,34 @@
 <?php
 
-use Symfony\Component\HttpFoundation\JsonResponse;
 use App\Application;
+use Symfony\Component\HttpFoundation\Request;
 
 require_once __DIR__.'/../vendor/autoload.php';
 
 $app = new Application();
 $app->setRootDir(__DIR__.'/../')->configure();
 
-$app->get('/api/sms', function () use ($app) {
-    return new JsonResponse(['status' => 'ok']);
-});
+$app
+    // ->post('/api/sms/create', function (Request $request) use ($app) {
+    ->get('/api/sms/create', function (Request $request) use ($app) {
+        if (!$app['validator.sms']->validateRequest($request)) {
+            return $app->abort(422, 'Invalid request.');
+        }
+    })
+    ->bind('api_sms_create');
+
+$app
+    ->delete('/api/sms/delete/{id}', function (Request $request, $id) use ($app) {
+    })
+    ->bind('api_sms_delete')
+    ->assert('id', '\d+')
+    ->convert('id', function ($value) {
+        return (int) $value;
+    });
+
+$app
+    ->get('/api/sms/list', function (Request $request) use ($app) {
+    })
+    ->bind('api_sms_list');
 
 $app->run();